Crosscut-saw jointer



Oct. 15, 1929. P. MORIN CROSSCUT SAW JQINTER Filed Feb. 26, 192'? iiiillllIllllllllllllllllllllllllIllllllllllIllllllllllllllll INVENTOR. flv/maew/wz BY .4 I '4 A ORNEY Patented @ch 15, 1929 rll'blG'ZlLOlfiT, IMESIGNUR T lldltlfillil' WASHINGTON, A CURPOPt-ATIUN OF 'llt 'flm.

GEOSEUUT-SAW JOJI'N'EEER Application filed February Q6, 1927. Eerie] No. 171,115.

This invention relates to a combined gage and jointer for crosscut-saws; and 0bjcet is the improvement in tools of this character to render the same more accurate and convenient to operate in correcting the ralzer teeth and in finishing the cutting teeth to terminate in a circular are best adapted for fell,- ing trees and cutting the same into saw logs.

The invention consists in the novel or struetion, and combination of devices herein after described and illustrated in the accompanying drawing, and particuhtrly set forth in the appended claim.

in said drawing,-

Figure 1 is a front elevation of a saw tool embodying my improvements, illustrated as applied to jointing cutter teeth of a saw which is indicated in dotted lines; 2 is a plan view of Fig. 1; and 3 is an end elevation of the same.

The tool constituting the present invention comprises a body or frame having a vertical web element 5 provided along its upper edge with two horizontally spaced apart flanges 6. Along its lower edge the frame is provided with flanges 7 and intermediate said upper and lower flanges 6 and 7 the frame is provided with ribs 8 adjacent the ends of the frame web 5. The flanges 'l and ribs 8 are of less width than upper flanges 6, the outer edges 7 and 8 0f the respective flanges and ribs terminating in a plane at right angles to the plane of the under surfaces 6 of the flanges 6.

Secured to the under sides of the flanges 6, as by means of screws 9 en gaging in threaded holes thereof is a block 10 extending across the gap between the inner ends of the flanges 6.

Elaid block is formed to provide a longitudinal slot 11 to receive a ralrer teeth R of a saw blade, indicated by dotted lines S in Fig. 1, when the points of the adjacent cutting teeth C bear against the flange surfaces 6 lhe block 10 is recessed above to afford between the flanges 6 a surface 12 in a plane parallel with and below the plane of the flange surfaces 6 equal to the difference desired between the cutting and raher teeth, which is accomplished by filing a raker tooth extending through the slot 1.1 of said block down to the plane of the surface 1 when the saw blade is held against the flanges 7 and ribs 8 and with the points of the cutting teeth (3 at opposite sides of a ralrer tooth R in contact with the surfaces 6 'lhe under side of the block 10 i. also formed to provide a recess 13 bet-ween downwardly directed ridges 14;, one at each end of the bl ch, Below said blocl: on the tool frame is a lug 15 which is provided with a threaded hole for engaging the threads of a screw 16 having a slotted head at its lower end and a plane upper end. lhis screw 16 is diz-aposed at right angles to the plane of the under surfaces of the block ridges 14 and midway between. the same. [recording to the present invention l: provide, in close proximity to the ends of the tool, screw threaded holes in the flanges 5 which are engaged by the threads of screws 18, hereinafter termed the regulating screws, the parts of such screws below the flanges being located in the space between the tool web 5 and the plane of the flange and rib surfaces 7 and 8 respectively.

In the use of the tool for jointing the points of the cutting teeth C of a saw a flat file indicated by F is employed as shown in Fig. 1tl 1at is to say, the file centrally of its length is pressed upwardly by means of the screw 1 6 to hear at each side of the latter against the ridges 14: at the ends of the block 10 until the file is bent slightly into the recess 13 in the underside of said block.

Thus aficcted the file at opposite sides of said block are substantially straight. To remedy this defect the regulating screws 18 are utilized to cause the ends of the file to be forced downwardly to extents to cause the ills to assume the curvature of a circular are, or practically so.

The curvature of the lile may be set to suit the eye of an experienced workman, or a tem plate of wood or other material may be made with an arcuate edge to try against the lilo until the latter is satisfactorily regulated.

t is to be noted that the tile has four bearing surfaces abovethat is, the two spaced apart block ridges 14: near the middle and the adjustable regulating screws 18 near the ends of the toolwhich act counter to the master screw 16 engaging against the underside of the file.

The symmetrical disposition of the fixed and adjustable bearings 14 and 18, respectively, above the file with respect to the adjustable bearing 16 below the file, not only provide sultable supports but also facilitate the setting of the file to a desired curvature,

as is most advantageously done by adjusting the screw 16 alternately with the regulating screws 18.

Excepting for the plates 20, the bridge 21, with the gage screw 22, and its lock nut 23 are substantially similar in construction and function to corresponding parts illustrated and described in U. S. Patent 1,175,546, dated March 14, 1916, in which there is disclosed a single plate which extended across the sight opening 24: in the frame web making it difficult for a saw filer to determine whether or not the screw 22 is in gaging relation with respect to raker tooth being tested.

In such testing, the cutting teeth are 2 brought against the plates 20, as will be understood by saw filers and others skilled in the art.

The provision of an unobstructed View of the work which is afforded by the elimination of a bar or plate spanning the opening 24: is of importancein regulating the teeth of saws for accurate and rapid sawing operations.

WVhat I claim, is,-

In a saw jointer, the combination with the body having a vertical web provided along its upper edge With two spaced apart flange elements, each of said flange elements being provided with a screw threaded hole in proximity to the opening between the flanges and a screw threaded hole in proximity to the respective ends of the body, means protruding from said Web in spaced relation vertically and horizontally of the body to serve as a side support for a saw blade, and a lug protrud ing laterally from said web at about the midlen th of the body,'said lug being provided wit a screw threaded hole, of a slotted block provided at each end thereof with a downwardly directed ridge, screws extending through said block into engaged relation with the first named holes of the respective flanges for securing the block thereto, a screw extending upwardly through the threaded hole of said lug and adapted to engage against a file and'cooperate with said ridges to clamp the file to the body and impart an arcuate shape to the file intermediate said ridges, and screws engaging in the second named holes of said flanges and engaging against the file in proximity to the ends of the body to impart regulated amounts of curvature to the file at opposite sides respectively of said block.

Signed at Seattle, Vashington, this 5th day of February, 1927.

- 7 PHILIACE MORI N. 

